The Martha’s Vineyard airport commission has the authority to establish salaries for its employees independently of other county employees salaries, an attorney for the Dukes County commission said. In a letter sent by email to county manager Martina Thornton on Dec. 11, Darren Klein, an attorney with Kopelman and Paige wrote: “In my opinion, as long as the airport commission has sufficient funds appropriated through the enterprise fund or otherwise, the airport commission has the authority . . . to fix salaries as it sees fit.”